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Topic: Magenta deposits in the gate?
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Josh Jones
Redhat
Posts: 1207
From: Plano, TX
Registered: Apr 2000
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posted 05-15-2000 07:44 PM
Hello, I work at a single screen theatre with a simplex 35/70 XL. I was cleaning the gate and on the left runner there was all this magenta powder. I also noticed it on the soundhead sprockets, outer teeth only.
what the *$&^ is going on? Is it from the soundtrack, and can it be fixed?Josh Oh, and before I forget again, 13 posts ago I was a newbie and forgot so say anything.
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John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 05-16-2000 05:38 AM
Josh:As noted by Brad and Ken, lubricating the film should help reduce abrasion from the projector. But since the dusting is so localized to one side of the print, you should also carefully examine the film path to see if there is any obvious source of abrasion. Magenta-colored powder is often from the emulsion. Occasionally, a freshly processed print will leave emulsion debris the first few passes through a projector because the gelatin emulsion swelled in processing and has not completely shrunk back in drying, leaving an overhanging "edge" that can be scuffed off. Kodak's "Film Notes for Reel People" had an article about projector dusting in the Summer 1998 issue:
http://www.kodak.com/US/en/motion/newsletters/reel/summer98/pointer.shtml ------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
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